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LivesandWorksofOxfordCalculators
31
movers,onthelimitsofthesizeofnaturalbodies;VII)OnthePrime
Moverandeternityoftheworld;VIII)Onthegenerationofsubstances,
onthenumericalunityofthesoul;IX)Onthefvesenses.61
TheproblemsponderedinPartIIIoftheSummawillbediscussedin
ChapterIIIofthisbook,62aworkingeditionofchapters5to11ofPart
IIIisalsooffered.63
6.RichardSwineshead
ThenameRichardSwineshead(fca.1340-1354)isnowdecisivelyasso-
ciatedwiththemostmonumentalandsophisticatedtreatiseoriginating
fromtheOxfordCalculatorsschoolcommonlyknownastheuBook
ofcalculations”(Libercalculationum).Infact,weknownothingabout
thementionedauthor,savethatbesidesthistreatisetherearepreserved
alsotwoshorttextsonlocalmotionandthefragmentofacommentary
onDecoeloattributedtohim,too.64Quiteparadoxically,theuBookof
61SeeE.Sylla,uJohnDumbleton”,pp.608-609.ThesecondaryliteratureonJohn
Dumbletonisnotasextensiveincomparisontoe.g.,ThomasBradwardine.See,
G.Molland(1973),E.Sylla(2008),uJohnofDumbleton”,[in:]uCompletedic-
tionaryofscientifcbiography”,vol.7,20;G.Molland,JohnDumbletonandthe
statusofgeometricaloptics,[in:]uMathematicsandthemedievalancestryofphysics.
Collectedpapers”,London1995;E.Sylla,Medievalconceptsofthelatitudeofforms:
TheOxfordcalculators,AHDLMA40(1973),pp.223-283;Eadem,TheOxford
calculatorsandmathematicalphysics:JohnDumbleton)s“Summalogicaeetphilosophiaenatu-
ralis”,PartsIIandIII,[in:]uPhysics,cosmologyandastronomy,1300-1700:ten-
sionandaccommodation”,S.Unguru(ed.),(Bostonstudiesinthephilosophyof
science,vol.126),Dordrecht1991,pp.129-161;Eadem,TheOxfordCalculator)s
MiddleDegreeTheoreminContext,uEarlyScienceandMedicine”vol.15,no.4/5
(2010),pp.353-357;J.Weisheipl,TheplaceofJohnDumbletonintheMertonschool,
uIsis”50(1959),pp.439-454.
62SeechapterIII,pp.112-125.
63SeeEditions,pp.393-425.
64SeeJ.E.Murdoch,E.D.Sylla,uSwineshead”,in:DictionaryofScientificBiogra-
phy,Vol.13,H.Staudinger,G.Veronese(eds),NewYork1976,184-185.The
formofthesurnameisquitecertain,ifweconsidertheversionsappearingin
manuscriptsandotherhistoricalsources,likeSuiseth,Suinshead,Svvyinshedeor
Swynyshed,asthosereflectingthepresentlyacceptedone.Withrespecttothe
nameofthisauthor,besidesRichard(orRicardus),alsoJohn(Johannes),Roger,
andevenRaymunduscanbefoundinthesesources.SeeR.Podkoński,Richard